Motion-picture reel



Oct. 11, 1949. I K ER 2,484,100-

MOTION-PICTURE REEL Filed Feb. 16, 1946 INIVENTOR. /I/W ffr/M l e/P.

admlumM Patented Oct. 11, 1 94 9 ATE'NF MQTION-BICTURE REEL Daniel; Kramer, Cleveland Heights, Ohio.

Application February 16, 1946 SeriaiNo. (ffllllliit (Cl. 242-'l'0L) 1 Claim. 1

This invention relates. to a. motion picture reel and particularly to means incorporated inthe-hub thereof adapteito. clamp an end-portion of a film inserted thereb'etween to retain it previous to the initial winding operation of the film thereon;

It is an object of. the invention. to provide:- a clamping means in. the hub of the reel which is simple, sturdy and. which'may be. constructed at a very low cost.

For the purpose of aiding: in. the explanation of the invention 1; show in: the accompanying" drawing and hereinafter describe one practical embodiment of it. It is to be understood, however, that this embodiment is presented merely by way of illustration and that specific showing and description of it are not to be construed in any fashion as limiting the appended claims short of the true and comprehensive scope of the invention in the art. There are, of course, numerous methods of performing the mechanical features of my invention of which I have shown but one.

Details of construction and arrangement of parts will be apparent as the description proceeds, reference now being had to the figures of the accompanying drawing forming a part of this application, and wherein like reference numerals indicate like parts.

In the drawing:

Figure 1 is a view in elevation, one of the flanges or shrouds being removed to disclose the clamp construction in the hub.

Figure 2 is an edge view of the reel shown in Figure 1 looking in the direction of the arrows A--A in Figure 1.

The motion picture reel l comprises two flanges or shrouds 2, 2, of wheel like configuration having an index marker 3 therein to indicate the location of the throat 4 of the clamping jaws in the hub.

The shrouds may be provided with circularly spaced perforations 5 for the reception of the lugs 8, integral with the hub which pass therethrough and which are subsequently clinched against the shrouds to secure them in assembled relationship therewith.

Each shroud is also provided with an arcuate elongated slot 1 for the reception of the pin that passes therethrough and which extends slightly beyond the outer surface of the shrouds as at 8 its purpose being hereinafter explained. The shrouds are provided with the conventional opening 9 for the reception of the shaft mounted in the motion picture machine on which it may be mounted, well understood in the art.

The hub 10 is made of relatively thin metal bent approximately as shown in Figure 1 so that the: portion H thereof forms. a: fixedjawwhich is braced; by the? integral portionv 12 the endpor-- tien I-.3 of. WhiChrUYBIX bBrSPOi'r weldedon otherwise connected to the wall I'Aof thehub-..

Connected to the fixed.- jaw" as at. [5 there is: provided a movableja-w member Hi consisting of a. strip of resilientmetal bent approximately as shown in. Figure 1.-. This. strip of metal; is narrower. than the axial thickness of the hub,.. and isso coni'iectedto the fixed jaw in the hub that there; is an equat spacabetween thelateral edges: of the strip and the inner faces ll of the shrouds, so that the edges of the strip will not come into frictional contact therewith to inhibit its movement on actuation.

Mounted on and connected to the movable jaw member adjacent its free end there is provided a bracket 18 of U-shaped periphery having a bore l9 therein for the reception of the pin 20 that passes therethrough and is made fast therein and which projects laterally therefrom and passes through the arcuate slots in the shrouds and which projects slightly beyond the outer surface thereof.

Interposed between the fixed jaw and its cooperating movable jaw there is provided a helical spring 2| under tension, the upper end of which is connected to the underside of the movable jaw,

- its lower end may be connected to the fixed jaw.

The movable jaw is normally urged in a direction toward the fixed jaw by means of the helical spring under tension. The action of the spring tends to prevent too free movement of the movable jaw it being constantly under its influence. The tension maintained by the helical spring and the jaw itself is such that on winding off the film from the reel, the end portion thereof held by the clamping jaws may be withdrawn therefrom without inflicting injury thereto.

A fixed shielding member 22 of a width equal to that of the movable jaw is positioned forwardly of the helical spring and is adapted to prevent the end portion of the film from becoming entangled in the helical spring after it is inserted between the clamping jaws previous to winding the film onto the reel.

The operation of the device is as follows:

When a film is to be wound onto the reel, the operator opens the clamp by manually engaging the ends of the pin that extends through the arcuate slots in the shrouds, and pulls the movable jaw away from the fixed jaw. The end portion of the film is then threaded into the throat and in between the open jaws to a depth to engage the shielding member, the movable jaw is then released and the helical spring connected to the jaws causes it to return to clamping position.

I am aware that my invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claim rather than the foregoing description to indicate the scope of the invention.

inner periphery of the hub and connected to the latter, the other end of the strip of material at the throat extending inwardly as'hort distance and curving backwardly towards the periphery of the hub, a movable jaw member having a portion connected to the laterally extending portion and extending therefrom, thence upwardly in parallelism With the fixed jaw member and terminating at an oblique angle from the fixed jaw member, its extremity being located behind the said inwardly extending portion of the said other end of the strip, a bracket having a U-shaped periphery extending laterally from the parallel portion of the movable jaw member and connected thereto and provided with aligned bores therein, a pin mounted in the bores in the bracket and extending through the arcuate slots in the shrouds and slightly beyond the outer surface thereof, a helical spring interposed between the fixed jaw and the movable jaw and adapted to return the movable jaw when released after manual operation, and a shielding member positioned above the helical spring and connected to the fixed jaw member and adapted to prevent the film from becoming entangled with the helical spring.

DANIEL KRAMER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 7 1,578,894 Joy Mar. 30, 1926 1,845,526 Spence Feb. 16, 1932 FOREIGN PATENTS Number Country Date 476,785 Great Britain Dec. 15, 1937 

